var BrsrL=BrsrA=BrsrSize=0;
if(document.all) {  //Internet Explorer
  if(document.body) {
    BrsrL=document.body.clientWidth;
    BrsrA=document.body.clientHeight;
    BrsrSize=document.body.clientWidth+"x"+document.body.clientHeight;
  }
}
else {              //FireFox
  BrsrL=this.innerWidth-30;
  BrsrA=this.innerHeight-30;
  BrsrSize=(this.innerWidth-30)+"x"+(this.innerHeight-30);
}